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Tru-Pos Locators UNJF thread

Need to measure some threaded holes 1/4-28 UNJF.
Anyone know where I can find plugs for this thread to check location?
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  • May I throw a wrench into the fray with respect to BURRS on threads. You can use a spherical probe and the pitch feature and STILL find a burr, raised edge, etc. One may locate the thread by first boring the hole, thread milling, and cleaning any imperfections away by circular interpolation using an endmill after the fact. Then MAYBE you can use the pitch feature with some accuracy. Any engineers out there reading this? All for a threaded hole, that will most likely have play.
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  • May I throw a wrench into the fray with respect to BURRS on threads. You can use a spherical probe and the pitch feature and STILL find a burr, raised edge, etc. One may locate the thread by first boring the hole, thread milling, and cleaning any imperfections away by circular interpolation using an endmill after the fact. Then MAYBE you can use the pitch feature with some accuracy. Any engineers out there reading this? All for a threaded hole, that will most likely have play.
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